If he spend his own balance and money from other people than I dont see any problem with that.
I dont know how I would react in his situation but I wouldnt be happy with stake announcement.
Yes it is not a problem if what he lost is fully his own money but if there are also some money that he should send back to stake's users. No valid complaint until now against poorbot, tried to find information at Stake's dedicated forum but seems that there is no post about poorbot to. Hopefully no one is affected by what was done by poorbot or in other word is that poorbot lost all his money only.