it's because of this, aswell as the great chance of some noob crashing into me and damaging my carbon bike that I only ride solo
I get highly pi**ed off when I'm riding, overtake someone then they try to ride right behind me and slipstream me, 2 inches away from my back wheel
Where I come from, we call this "taking a pull." It's the foundation of all group rides. If this pisses you off, I guess it's better for all involved that you ride by yourself.