Marcus James (pictured), 28, put the Twitter issue aside and drove Eileen and George Chapman, both 75, to their local branch of Tesco in West Hampstead.
James told The Daily News that he had endured a frustrating week, failing to install a Facebook app on his new Galaxy smartphone and then being thwarted on how to change his Twitter background image.
"I suddenly thought of the couple who live next door. Sometimes I see them and they go on about how difficult it is to get to the shops. They're a bit selfish and self-obsessed, to be honest.
"Anyway, I thought I could just give up on the Twitter problem and help them, maybe. It just came to me. I spent about half an hour searching for them on Twitter but I couldn't find them. So I went next door and just knocked on their door.
"It felt pretty weird – creepy, like stalking.
"They were very happy that I had called and they talked a lot on the trip. Some of it wasn't in 140 characters. They laughed at some things I said and repeated it. It was like retweeting but with real heads."
Twitter forums have been buzzing as news of the trip spread, with some people claiming James' account had been hacked.
"Doesn't make sense, wtf?" said one hedge fund manager who is among James' followers. "All he needs to do to reconfigure Facebook on the Galaxy is select 'Apps > Social > Top free and then select Facebook for Android.'."
A female follower of James said: "He didn't need to take the oldies shopping. Just go to MyTweetSpace to change that Twitter background, Marcus!"
Other Twitter users were quick to respond, with many offering him fixes to the problem so that he could stay in and tweet and not have to help the old people.
A spokesman for Twitter said they had not heard of anyone giving up on a technical problem to take old people shopping before but that it would be a subject of debate for this weekend's user conference in London.Tweet