You have to install their special "coupon printer" and give it permission to access your system in an insecure manner. And then most of the coupons are either expired or won't print for some other reason!
I didn't really want to download their printing software, but after I did, I scanned it with Panda av and Malwarebytes. Both came up clean. I didn't sign up with my email, so I can't say whether or not they spam, but their site seems harmless and helpful.
Never had any sort of problem with coupons.com. Always been an excellent rescource for great coupons for me. Only problem I have is they don't sort coupons by what's expiring first. But that has nothing to do with safety, trustworthiness or any of that stuff.
A family member clicked on the site and was on it for a few minutes using Firefox, which is secure as heck, and the site downloaded and installed it's program without anyone even knowing. Luckily it didn't get lost in my huge start menu and I found it and removed it. Right now Malwarebytes' is doing a scan. I will update this post if it finds any malware. Even if it doesn't find any, any website that does that is taking part in drive-by downloads and other shady methods. I couldn't care less if it held a TRUSTe seal. That only means that they've been very successful in their scamming and bought it to help seduce more idiots!
This came pre-installed when I bought my PC 12 March 2011. No problems, never had to give my name or anything. Does not work on Google Chrome, so if this is your default browser you'll have to switch to IE to make it work.
I never got ANY malware from this site and I have protection from malware on my computer. If any malware is detected, I get notified. Never have I found malware on coupons.com.
And I never got any viruses from this site, either. Maybe the people who have been unfortunate enough to get malware and viruses don't have good protection. :( Sad.
I find this site to be very useful. I get TONS of coupons from all types of products; some the same as the newspaper; some different. Good site.