[why is it that the kind of people who storm around ranting so viciously about child sex abusers can't call 'em what they are, whether that's "child sex abusers", or "paedophiles" (if you must). It's always "pedos". You'd think that if they considered the offence so very, very serious, they'd use the proper name for it, rather than trivialising it in this way. Or perhaps their written inarticulacy is representative of their thought processes]
Anyway, I think that anyone trying to establish some kind of moral hierarchy between paedophiles and people who drive while uninsured is on a bit of a sticky wicket.
What is interesting, though, is that you have unintentionally compared two groups that are similar in an unexpected way: uninsured drivers haven't necessarily had an insurable loss, and "paedophile" describes someone with a sexual preference, but who may well not have committed an offence against a child. In both cases, the harm remains in potentia.
Nonetheless, that's about the only similarity between the two. An uninsured driver makes the choice, ultimately, to drive while not insured (leaving aside the case where his mrs forgot to post off the renewal letter, etc); the child sex abuser has a compulsion to abuse. In most cases, unless they have an accident (and yes, I'm aware that uninsured drivers are considerably more likely to than insured ones - but that's not specifically by virtue of their not being insured), uninsured drivers do not intrinsically cause any damage or harm, and even if they have an accident, it'll be much more likely to involve a financial loss than permanent harm or injury; a child sex abuser (assuming you meant that when you used the illiterate and inaccurate term "pedo") DOES cause harm by his offending, and harm that can be severe, and long-lasting.
Are you seriously going to try and establish an equivalence between (say) the writing-off of a £5000 car and the psychological trauma caused to a young child who is abused?
They're both illegal, and for good reasons. That is, surely, all that needs to be said on the matter.