Personally I don't do that. Unlike many technical people, I don't have AdBlock installed either.
Giving a service attention and eyeballs in this day and age is like giving them money. It's actually worse, because you're the product and so they don't treat you like you're the customer. Even if they don't get money from you, even if you're using AdBlock, even if you are totally immune to advertising or any other means of indirect monetization, they might get something from your friends, which is why Quora is insisting on logging in with your Facebook account and showing your activity to your friends. And even if you don't log in with your Facebook account by bypassing their wall, you might send links to your friends at some point. So the mere act of giving them eyeballs is helping them grow and is encouraging them (and others) to use the same tactics.
What I do is that I simply don't use Quora or any service or website that doesn't treat me well. Quora does have some interesting content in there, but it isn't valuable enough for me to do any sacrifice. Even if it's a free service, I'm not putting up with free services that don't respect me. If companies need to monetize and provide value worth paying, all they need to do is ask for it, as I've got money to spend on valuable things.
Otherwise I would rather focus my attention on things and products that actually deserve it.
I don't use Quora either but it's annoying when it comes up in a search when I need some help. I cannot wait for Google to fix their blacklist so I can add it to the list with experts exchange. (Before anyone mentions it, yes I know you can still get to the page to add urls to the list but it doesn't work, try it out.)
Giving a service attention and eyeballs in this day and age is like giving them money. It's actually worse, because you're the product and so they don't treat you like you're the customer. Even if they don't get money from you, even if you're using AdBlock, even if you are totally immune to advertising or any other means of indirect monetization, they might get something from your friends, which is why Quora is insisting on logging in with your Facebook account and showing your activity to your friends. And even if you don't log in with your Facebook account by bypassing their wall, you might send links to your friends at some point. So the mere act of giving them eyeballs is helping them grow and is encouraging them (and others) to use the same tactics.
What I do is that I simply don't use Quora or any service or website that doesn't treat me well. Quora does have some interesting content in there, but it isn't valuable enough for me to do any sacrifice. Even if it's a free service, I'm not putting up with free services that don't respect me. If companies need to monetize and provide value worth paying, all they need to do is ask for it, as I've got money to spend on valuable things.
Otherwise I would rather focus my attention on things and products that actually deserve it.