Tom Kenny has been the voice of Spongebob Squarepants from the get go ... and he feels fellow voice actor Kevin Clash did the right thing by resigning after allegations surfaced he had sex with two underage boys.
Our photog spotted (or maybe heard?) Kenny yesterday at LAX where he told us he's never met Clash, but feels the "Sesame Street" puppeteer needed to step down.
As TMZ first reported, a second accuser came forward and said he had a relationship with Clash when he was just 15. Clash resigned hours later.