I spent a little over 4yrs as a 'tanker toad' and I never dragged anyone into or near a thunderstorm. I did meet some guys in some nasty wx in Thailand, in and around the Laotian and Cambodian boarders and in one case deep into northern Laos where we were on a SAR mission to refuel some F-4s covering a downed F-4. We had to drive around a lot of bumpers and no, we didn't do a standard pattern but all 4 F-4s got a full bag of gas before we had to leave and head back to U-Tapao.
During my time in tankers, we plugged -105s, -106s, B-52s, RC/EC-135 and were tagged by F-100s, RB-66s when we were draggin' the basket but again, it did no one any good driving into cells.
But yes, some did so focused on doing what they thought was the assigned task and screwed things up.. but it didn't happen often.