No... if you're pumping it correctly it shouldn't matter even if you pump while the ejection port is facing down. There is no reason to pump the shotgun slow enough to let the shell come out.
I think so, and I see your point clearly......especially being a left handed shooter, most likely to roll onto right side to pump the gun if prone.
Regardless, they are a good shotgun for a reasonable price and I wouldn't let that deter me from buying one if funds were limited.
The mere racking of the gun sends a clear warning. Its a very distinctive sound and only a fool would continue to advance after hearing it.