Both yes and no on this one, in my opinion.
It's not simply slaving away at the keyboard, it's connecting yourself to the machine and ripping out something brilliant
from you.
The best script kiddy efforts could maybe reach 4-5 on the program difficulty scale (Assume a minimum security rating of Green 8 ) which would be quite sufficient (10-25% chance) in ripping off user accounts and maybe scoring some free cred, but unless you can really get a decent programmer (Which, sadly, some of the RL spammers have got), time and a decent setup, your Nigerian mail scam won't even make it to the front door.
Sure, the kiddies are out there, with skills of 4-5 and maybe a 6 or more. But how many of them are going to actually spend the necessary time to program something that will sleeze past hostile IC? The programmers with a skill of 7 won't be wasting their time with this if they can spend 30 seconds online and walk away with

30K on their credstick.
Since the Matrix is now the great equalizer, reading and writing not so important and everything a subjective icon, the script kiddies are, quite likely, kiddies.
If you were in middle school and offered an even :nuyen:1000 for something you could hand in as a school project AND only took you a couple of weeks to do, would you jump at it?
Sure, me too. And look for more.
It's "white collar" in that you're not-so-likely to be busted as if you were dealing drugs, but dirty enough to make a profit.
Hell, I'm assuming that a lot of the so-called "Matrix Gangs" churn out that drek for fun and beer-money when they're not off messing up low-security nodes.
-Interesting thought: What do the Okatu think of spam? I can't imagine anything much more dissonant than my spam inbox.
So yes, spam is there. So are burning-hot utilities designed to hunt-down and lobotomise the creators of the same. If Tar pit utilities can frag up ALL copies of a particular program on my deck, I can imagine a
lot of someones going through their inbox, culling the spam, letting the tar pit-armed smartframes get a good sniff and then let them loose.
I'm sure, IRL, that if people had the chance to hurt the author/s of Spam, anonmyously, a small proportion, say 1/10000, would take the chance.
In Shadowrun terms, that's a lot of hunter-killer programs trolling for your particular brand of annoyance.
Rant off,
-Tir.
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