Is there a way to blacklist particular wifi connections?

So here's my story about why this feature is needed.

I'm here in the US, and there are a lot of places *cough-starbucks* that have open, but not free wifi. The N900/Fremantle seems particularly taken by any open wifi connection, and seems to want their children. I.e. it really likes to connect to any open wifi connection out there no matter what.

However, I don't want to pay for their internet connection because I'm already paying for mine. I don't care that I'm with AT&Terrible and can only get 2.5G, I'm not going to pay for it again.

Okay, so my N900 and I always have this conversation whenever I'm at these places, and I tell it, "I don't want to use the WiFi here. Please just use GPRS. I don't care that it's slow, I'm not paying for it."

And it says, "Okay, I'll turn off the WiFi, and connect back up to GPRS." And everything is cool for a little while.

But then, I think about 45 minutes later it forgets that we had that entire conversation (well, more like isn't even aware we had it in the first place since it can't read minds, but I'm working on an app for that), and says to itself, "Why am I using slow-*** GPRS when there's Awesome open WiFi here? Hmm, maybe I should connect to it, and perhaps try to have its child."

And suddenly all kinds of apps start screaming, "I can't connect to my favorite servers!! What happened?!"

And the browser says, "Uhh, this security cert doesn't make sense, what's going on?"

And I say, "Ugh, I just told you, I don't want to use the WiFi here. Go back to using GPRS. Jeez."

And the N900 says, "What? We didn't have that conversation."

Anyway, like I said, is there a way to blacklist particular wifi connections for this reason?

PS BTW, the reason I'm not with T-Mobile is because they don't cover where I live, and I'm not paying roaming charges for anything and everything I do.

Maybe just turn off the "automatic searching & connecting to WIFI"?

menu/settings/internet connections/connections

find the attwifi and delete it.

it should now, not try to connect to it automatically.

i have uverse for my home, so it is free for me, but i do not like loggin in...and i have it included with my tmo total internet too, but again, do not like to log in.

so i found that by deleting that "connection" in the connections, that it stopped trying to connect when i was at five-bucks...uh, starbucks.

if that doesnt work fo r you and for some reason it still wants to connect, then un-check the box for switch to wi-fi when available while you are there.