It's not new in this world 
. If you've joined this world for years I think it's very normal and Binance is not the only exchange did that. Coinbase is also do the same when the whole market pump or dump ). They often close their exchange to prevent investors and traders from buying or selling cryptocurrency at that time, although they announced that their website has some problems need to be solved but I don't think so cause these problems always appear when BTC and ETH price pump to a new ATH or dump to really low price ).
This is the real thing into this market which not only exchangers do made such thing but also into 3rd party wallet too.They do blocked such deposits or even withdrawals when theres a certain pump and dump.. If you've joined this world for years I think it's very normal and Binance is not the only exchange did that. Coinbase is also do the same when the whole market pump or dump ). They often close their exchange to prevent investors and traders from buying or selling cryptocurrency at that time, although they announced that their website has some problems need to be solved but I don't think so cause these problems always appear when BTC and ETH price pump to a new ATH or dump to really low price ). Sometimes it gets crowded, but in some cases some of them are fishy.
Legally illegal I hope that some regulation bring some good stuff too, not just taxes
When regulation do happen these kind of possible fishy activity made by them would be monitored out which is good but we know regulation is still debatable upto nowadays.Legally illegal
I hope that some regulation bring some good stuff too, not just taxes