If grabbing the b pawn is bad ....

Grabbing the b pawn with your queen is considered one of the cardinal sins in the opening (Bobby Fischer notwithstanding), so how bad is grabbing the a pawn?
Examples of this sin are not that common, but here is a recent game where Black did this and lost horribly. As to whether the blame can solely be attributed to the pawn grab, (or neglecting the centre, not developing, and failing to castle) is an exercise left to the reader.


Dreev,A (2657) - Loiacono,Antonio (2317) [D02]
10th Dolomiti Open 2019 Forni di Sopra ITA (2.2), 16.06.2019