I already have a lot of satoshis lost around several bitcoin exchanges. I can't withdraw those satoshis because they don't even worth the fees.
Like me there's thousands of others in the same situation which would make a lot of BTC. So I take it that exchanges keep these satoshis for them.
What do you think? Should exchanges be responsible for the fees and return every satoshi to their owners?
That is a very good poing. I guess that yes, they keep them, which makes the exchange somewhat more profitable. However, user may get some more satoshis and sum them with the ones in the exchange to finally withdraw all.