"Temporary" fantasy football trades - legit tool or D-bag central?

[nevadaJACK]

Came up with a pretty sweet trade concept (altho I'm sure it was already pretty common knowledge), which helped out both me and another guy in the league last week -- basically he sent me his backup QB and I sent him one of my backup #1 RBs with the understanding that we'd swap them back immediately after this week. (Helped us both out because my QB had his bye week, and there were no reasonable waiver wire pickups, and he was in need of a RB for the same reason.) Other ppl in the league called shenanigans (and they went ballistic when it turned out that the trade gave my trade-partner a narrow victory -- didn't end up helping me unfort), but I thought it was perfectly legit. What say you, OOT?