HiG do not comment about this possibility. Why should they ban it?
If you play a complete C2 game (no CnP and no PnP), you should have 362 (without taking into account the start tiles, the scoring tiles with 50/100, the scoring tile for gold, the message tile, the abbey tiles, the halflings, the German castle tiles, the king tile, the robber baron tile and the river tiles). A tower dispenser is for maximum 180 tiles.