When playing in a game and you have an older guy and a young kid batting near the end of the innings, the older guy keeps intentionally taking suicidal singles in the hope of a)keeping the strike and b)running said kid out because he isn't going to hit boundaries.
I hate that, especially in friendlies. Ok, so you might not win the game but maybe, just maybe in a few years time the experience that youngster is gaining will keep him participating in the game and improve him.. Running him out is a sure fire way IMO of making him think 'sod that' and giving up. We just let him run his singles and stick everyone ont eh boundary, not even bothering to keep four men inside teh imaginary circle for him.. Players hate that on a big boundary when needing to hit boundaries
I think this depends on what level you play. I have played in similar situations where it actually made sense to run someone out, this was an older guy who opened and usually saw the shine off the ball, he often remarked that he wanted to be run out so that the youngsters could then put on the runs.
However, I have been in a similar situation as a colt where I was playing 2's cricket and was continuously called through for suicidal singles so that the senior could have the strike. However, it was a beautiful thing to see the Senior bowled in the following over. I often remarked to said senior that I could also miss one on middle stump if required.