There are many selfish hermits and yogis present today, especially in the area of modern/wester originated young "sages" and "heros" living without dependency/foundation/Nissaya, even in the middle of a community, who often think that they are practicing on the path, avoid to be responsible within their societies, nurish on things either not given, taken from the societies they still take part, or don't do their duties.
For many they look like real Samanas but their hearts are are that of a
Gollum .
For deals they give, when having gained of what they seek for, they disappear. If having lost their treasure, they approach, direct, silently, either doing a trade or looking for ways to take.
Many who have not overcome stinginess, now dwelling like hermits and yogis, imitate their ways, is very harmful for them and it's not really possible to trace them for householder or monks having still signs of householders.
Such "sages" will often be found in book-stores of householders and are of cause also very attractive for people with, what is called, saddha/raga-carita (faithful/greedy nature/character).
When they have done their performance, they return in their "house/hermitage" and enjoy the gained.
This has to be understood in merely outwardly aspects as well in very subtile mental aspects.
How ever, it is importand, if one likes to clean away this Gollum-heart, to start with the gross defilements and go back into a not neglected Nissaya (dependency) where one could reach finer aspects to be traced and purified, possible gaining the state where outwardly livelihood and mental are in tune.
But often it's nearly impossible to see such in oneself and one fastly becomes the fourth kind of Samana, one in outer areas, even apart of borderlands.
Cunda Sutta: To Cunda
unda the smith:]
"I ask the sage of abundant discernment,
awakened, lord of the Dhamma, free
of craving,
supreme
among two-legged beings,
best
of charioteers:
"How many contemplatives
are there in the world?
Please tell me."
[The Buddha:]
"Four contemplatives, Cunda. There isn't a fifth.
Being asked face-to-face, I'll explain:
the Victor of the path,
the teacher of the path,
one who lives by the path,
& one who corrupts the path."
[Cunda:]
"Whom do the Awakened
call the Victor of the path
[&] one who is an unequalled teacher of the path?
Tell me the one who lives by the path,
and explain to me one who corrupts the path."
[The Buddha:]
"He's crossed over perplexity,
his arrow removed,
delighting in Unbinding, free
of greed,
the leader of the world with its devas:
one like this
the Awakened
call the Victor
of the path.
He here knows the foremost as foremost,
who right here shows & analyzes the Dhamma,
that sage, a cutter-of-doubt unperturbed:
he's called the second of monks,
the teacher of the path.
Mindful, restrained,
he lives by the well-taught Dhamma-principles,
path,
associating with principles without blame:
he's called the third of monks,
one who lives by the path.
Creating a counterfeit
of those with good practices,
self-asserting, a corrupter of families,[1] intrusive,
deceitful, unrestrained, chaff,
going around in disguise:
he's one who corrupts the path.
Any householder, having ferreted these out
— a discerning disciple of those who are noble —
knowing they aren't all the same,
seeing this, his conviction's not harmed.
For how could the corrupt with the un-
corrupt,
the impure with the pure,
be put on a par?"
On the otherside, when meeting someone or groups which dwell heedless, it could be possible that those are actually within the Noble Domain and this is why the matter of right view is much more importand as signs outwardly.
As the Buddha told in DN1, if householders praise the Buddha, then because of his virtue, yet, of course, this is a fundamental factor at first place.
There is, for householders (or those with signs of it) no other way as to live and observe for a long time next a person to find out if he/she is someone on the path to liberation or possible already within the domains or it's peak.