Do you also raise big PP by the same amount? This type of raise looks like a moderately good but not powerful hand, which is exactly what you have. An aggressive player will reraise to put you to the test and is likely to raise on almost all flops, this is particularly true if you have just entered the game.

I suggest you flat call with AQ in early position when you are new to a table, but I have a tendency to be weak tight. An aggressive player is likely to make a 4BB raise and then either reraise a single raiser or fold.