Absolutely.
Any pranks or disagreements are only over when he decides they are over.
He was going on about how his messing up Aubrey's bed was just an 'eye for an eye' and now that was done he wouldn't continue it but that was him continuing it as her messing up his bed was her 'eye for an eye' after being slapped in the face with the pie.
He acted first with the pie
She reacted which shouldn by his own logic, have been equalizing it.
He acted the third time with her bed
So, even if Sam had taken the mask, that would have been the fourth strike, revenge for messing Aubrey's bed.
He started it all.
I'm sick to the back teeth of BB covering for him and not showing us everything as I had started to think he wasn't that bad in recent days as he'd calmed down but then we find out about him causing a housemate to require medical attention with one of his 'japes' and it not being shown. Even after that, the next day, he again shoves something in somebody's face?!
Unbelievable.