A cookie is not a program and therefore cannot contain malicious software such as viruses. Cookies are always associated with the domain of the server that sends them.
Some banner advertising companies use their cookies to track your surfing across multiple sites among their affiliates. This is accomplished by having the banner graphic actually be fetched from their server, not from the web site you intended to visit. You can (with most browsers) configure your computer to automatically reject such cookies. In any case, SCAtoday.net emphatically does not use this kind of cookie anywhere on the site.
It is the policy of SCAtoday.net to make the site work as much as possible without cookies enabled, but for some features, this is not practical. Users may choose to configure their browsers to disable cookies, but may not be able to take advantage of the personalized features of the site.
If you are really concerned about the privacy features of the SCAtoday.net web site, and you are technically inclined, you are welcome to download the source code and examine it for yourself. The source code for most of this web site is released under an Open Source license.