I'd pull the tupperware and eyeball the engine. Oil leaks are usually found around the valve cover or oil filter, not so much coming out of a hose on the bottom of the bike. Regardless, these leaks are rare. IIRC, there have been the occasional post about excessive oil in the bottom of the air box - usually a result of too much oil in the crankcase. Check your sight glass, too. There was one post about a leak around the glass window, which is easily replaced*.
Get a sample of the goo from your kickstand and sniff it. Aunt Freeze will smell sweet (compare the smell to what you have in a jug of anti freeze). You can also spray clean the center stand and go for a ride. See what collects after a half our or more at sustained speeds.
*Easily after you drain the oil, of course. Or lay the bike down on the opposite side to get the window area dry, and then replace it and the O-ring. Best to do this with an empty or almost empty top gas tank.