AdBlock plus 

Blocking ads means you block considerable amount of revenue generated from said ads, as blocking ads also blocks any revenue from ad "impressions" which occur just by loading the ad, without clicking on it. Granted, not all ads have "impressions" but even a little is a lot to sites such as HLP.
In other words, you're doing any website you visit, including HLP a disservice by blocking ads. For your convenience admins have to pay more from their own pockets or beg people to donate.
Is it really too much to ask that you do not block ads on websites you don't pay a dime for? Contribute to the upkeep costs by not blocking ads, and help by reducing the number of donations required.
It is great that HLP has so many visitors who actually donate in times of need. But I, and I assume most of you would prefer not to donate at all. To accomplish that as much ad revenue is needed as possible. Going on ad clicking rampage is prohibited however, as last time someone went on clicking spree Sandwich got his AdSense account permanently banned. Same goes for any website you visit, with the possible exception of paid subscription services.