using your own source, it lists authorative sources like the FDA stating that Sucralose/Splenda is safe unless consumed in extreme amounts (at which level pretty much anything is harmful). The only "study" your source lists as "proving" harmful effects requires an intake of 10 times the recommended normal dose over prolonged periods, and even then the effect cannot be replicated in humans.
Another study, published in the Journal of Mutation Research, linked large doses of sucralose equivalent to 11,450 packets (136 g) per day in a person to DNA damage in mice.
is typical of the types of things that get mentioned (without the actual massive doses required of course) in popular press to "show" that things are dangerous. If you need to feed a mouse 11.500 teaspoons of Splenda a day to create a condition that might lead to cancer, the amount for humans would be millions of teaspoons a day. Even the worst sweettooth isn't going to eat that much of the stuff :)