Seriously, you people are ridiculous. All my childhood shows are being torn apart, criticized, and hated on.
No offense, but you wouldn't understand the show unless you were a 90's kid. I grew up with this show, among others, and I LOVED it. Still love it, to this day. I'll go on Youtube every now and then to watch another episode.
Yeah, okay, it's not educational. It's a bit violent, somewhat weird, but you can't deny that it's entertaining. I would stay up/wake up early to watch this show when I was a kid, and even the episodes that seemed a little stupid/pointless I still enjoyed watching.
Honestly, it's not a bad show. My childhood was based on this show, yet I'm not in any way violent or rule-breaking--I'm just me. If your kid turns out evil because of the cartoon...well, then something's wrong with your kid. Every person I know who was a fan of the show such as myself are completely normal people; back then, us children knew that Dexter's Laboratory wasn't promoting violence...we knew it was for entertainment purposes only.
Personally, I miss the show. I know it's on Boomerang, but there's no way I can stay up till 3 AM to watch it. So, if it's on, don't worry; it's totally fine for kids. Maybe not the three year olds and under but 5-7 should be okay.