I have a home that was built in the '50's and want to replace some of
the 2-prong electrical outlets with 3 prong outlets (the third prong
being the ground). Following all the normal safety precautions can I
simply install a 3 prong outlet in its place, leaving the ground
unconnected? I know this will defeat the whole purpose of a ground,
I'm just looking to have to stop using adaptors anytime I want to plug
in a three pronged device (which also defeats the purpose of the
ground). Aside from losing out on the safety aspect, are there any
other risks to doing this?

Otherwise, what's involved in running a ground? Is it complicated for
a DIY'er? (maybe if I have to ask, I shuldn't try it). Or would
installing GFCI outlets be an alternative? Thanks!!