Kickstarter is trying very hard to NOT back that perception. They have and continue to make changes to make it clear that Kickstarter is not a pre-order site.
Kickstarter tries very hard to backpedal on that perception when it's about to blow up in their face. They made that "Kickstarter is Not a Store" blog post and the associated policy change after the press showed interest in the seedy side of Kickstarter; I forget what the exact catalyst was because it was some time ago.
Pretty sure it was the Pebble Watch. Their largest, most publicized project was called in to question after repeated delays.
I think the subsequent changes (i.e. no renderings) made make the platform substantially better. But they still need to get away from that "presale" perception that the general public has.
The first few projects I backed were friends or just because I thought they were cool ideas that would be awesome in real life. Getting something in return was really, in its purest form, a 'perk'.