If your going through TOR your going to get hammered by google.  Look at it as a punishment for attempting to keep your privacy and not allowing google to spy on your activity.  

If your in an IP range with someone spamming your going to be hit as well even though you own your IP address and its private.  Google will just nail the entire range of IP addresses.  

If you have a clean IP address that Google likes you will simply have to hit the green check-mark and you will go right in.  

This is the issue allowing Google to play cop.  You have one of the slimiest corporations around playing god.  

One way you can get around the issue cheap especially if your spending lots of time getting screwed over on this is to buy a private Ip address.  You can get one for about a dollar a month and they allow you to refresh if you get a moron in your range spamming.  Should save you way more than .80 cents in time per month.  

This has nothing to do with Bitcointalk (aside from them installing it).  Google is the one giving you shitty reCAPTCHAs