I must say, I tend not to research any partner I play with on BBO. I wonder what he would've done if I didn't have the
♠K either (hence making a 5
♠ response possible) because then, I would expect 7NT to be cold, nevermind having to guess for it. I must admit myself that I do use quite a wide range for weak 2s myself (like 0-11

), mainly in third seat though (my 1st/2nd seat weak 2s would be 5-9). I do find a lot of people redouble without asking themselves is there a way the contract is off.
At the end of the day about that hand, I felt there was a chance at 7NT (he only needs
♠xxxxxxx and any other shape for the rest of the hand that includes having the
♣A for 7NT to be cold). Did he think I would be able to see his alert?
All I can say is that in the 3 hands we did play together, 2 of the contracts were doubled.
He also seems to have a habit of not answering blackwood, just found another grand slam that got doubled and he alerted 5
♥ (hearts were agreed) as bid not answer, same as on mine. Also found a hand where he went up to 6
♥ unsupported with 4 points (and not a 12-1 hand

) opps bid 7
♣ which he doubles and they made (unsurprisingly) a jump to 3nt on 12 points opposite a WJS which was admittedly a little weak too IMO.
The auction for that -2200 was just stupid, enough said auction is (going continuously W dealing in adverse vul (P-1C-P-1H-P-2H-P-4H-P-P-4S-X-6S-X-P-P-7S-X-P-P-XX-P-P-P). It was his partner who made the stupid bids towards the end, but the 4S bit he did make was on a 4144 8 count (with singleton Q). One of the -1700s was again foolish, if you're going to be in grand slam, you would expect to make a little more than 7 tricks, right? Overall, I just don't think this guy knows what he's doing. I'll stop talking before I get myself banned