At the same time I suggest to activate 2fa system on every exchange account that keeps any type of tokens.
Many people can confirm it since same as you I encounter such bad issue regarding on that site that's why I made my decision on not to trade any alts available on that place. Maybe new people should advise to avoid that site to so that the pile of people who enrage at them will be lessen and their scam business will shut off.
Now a days I do hear lots of exchanges also started such activities like infinity maintenance mode after long good and reputed services or locking account and asking KYC clearances etc. For example, idex.market keeps showing "Trading under maintenance". I guess it is time for more reliable exchange services where we can find friendly and no-worry trading experiences.
Yes, you are right, the most people do not search before they trade. This was my case too. I admit I did not search online enough, but the problem is that there is so few exchanges that supports trading from my country... I can deposit and trade, but when I need to withdraw money, on most markets that is impossible! One of the few where I can withdraw my money is YObit, where I can easily make transactions to my account. And it was no problems with selling coins on YObit and withdrawals. I sell more than 6 ETH I mined, procedure was to deposit on YObit when price was good, sell ETH and withdraw! This operations was long 5 minutes and I did not have any complains! Problem was when I decide to not withdraw USD when I sold my ETH than to try to trade a little. My USD was at my account only one day! Next morning they vanished!
It is not possible that I was hacked just that day when I had USD on my balance! NO CHANCE!