People who do such a thing are perfectly idiotic. I mean, come on! Are আপনি seriously not confident enough to get your অনুরাগী through your own merit? If others want to be your fans, they'll do it. Asking them to add আপনি অথবা threatening them is plain stupidity.
In my case, I don't go asking for fans. In fact it's almost the opposite: I'm not even hoping anyone would add me. If they want to, I say go ahead, and I'll add আপনি back in return. I bet those who ask আপনি to add them don't add আপনি back anyway.
The people who ask to add them I guess, since I know the people who threaten to প্রতিবেদন আপনি are full of sh*t since that'd be impossible for them to do... xD