The short answer .... No
There is a lot more involved than what your saying. We typicly put cookies in 2 different catagories (good cookies) and (Bad cookies) I always say as long as you have a glass of milk there is no such thing as bad cookies :lmfao:
Ok ... seriously though...A cookie is a piece of text that a Web server can store on a user's hard disk. Cookies allow a Web site to store information on a user's machine and later retrieve it. The pieces of information are stored as name-value pairs.
The Web site that stores the data, and later it receives it back. that Web site can only receive the data it has stored on your machine. It cannot look at any other cookie, nor anything else on your machine.
So when you store log in info for a forum such as this ... there isn't a big problem... unless your using a public computer or a computer used by multiple people in your office or something.
Let's say that you use a public machine (in a library, for example) to purchase something from an on-line store. The store will leave a cookie on the machine, and someone could later try to purchase something from the store using your account.
On computers where you have different "accounts" (typicly Windows NT computers) you don't have this problem.
so your wondering other than the above "whats the big deal" well lets say you go to
www.poorboys.com(im just using this as an example) So you go and buy your items and enter all of your information ect. Well now not only do they have your address and phone number but they know what you bought so some websites may sell this information and then you get on mailing lists spam mailing lists ect.
There are certian websites that have been knowen to create cookies that can actually be read by multiple websites and track your movements around these sites and in some aspects they can even see what your typing in to search engines. (not cool

)
So at the end of the day here is what I recomend as a computer geek! If your not a big "websurfer" and tend to go to only your regular places on the web then I wouldn't really worry about it. But in the same breath ...I do recomend occasionally deleting your cookies (i do it on a weekly basis) if i have bought anything recently then I do it more often!
If you are a big websurfer... get a pop-up blocker ... the pop ups are big offenders of cookies.... (i recomend the google bar which has a built in pop up blocker) it works great and doesn't let anything through! delete your cookies more often ....and that it ... there isn't much more you can do!
They have been trying to legislate spam, and cookies to no avail, they keep coming back with extreamly lame excuses as to why they "can't" or shouldn't get involved ect... its a battle that I am sure we will win in due time but for the time being just watch where you go on the web!