Besides, is there actually proof of Yobit doing this, for the exact reasons you've mentioned?
Or is it just a coincidence?
What's a coincidence? What proof do you want of yobit being scammy?
Them actually disabling wallets of coins that are dropping in value?
For the record, I'm not saying this isn't the case, I've never used Yobit myself, nor have I heard about these claims.
All I've heard is that they're a shady exchange, but I've never really looked into it any further than that.
Why would I trade on Yobit, when there are dozens of other options out there that don't have such a negative reputation?