B) Fake channels:
An example: true channel AsuraCoin, fake channel AsuraCoins. Trust only the links on the official page, you may end up scammed and it is sad to see users asking for their tokens after sending ether to a hacker.
This very true...and a crucial thing to watch out for, I have seen it played about almost every telegram group and channels I have joined, most especially as I usually copied the ID and search it in the telegram clients' search box.
Btw, scammers most often played on the ignorance and greed of people. If you are going to do anything, please take some time and effort to educate yourself deeper about it, also watch your greed; if it look too good to be true it's probably is.