How to get rid of advertisement topics in the forum

Need advise from all professionals who succesfully build a good forums

[tone]

Hi,

I have had a serious problem about advertising topics attack my forum. My forums was going quite well and it was getting more popular but the dark side of that was those ridiculous folks post the thread all over my forums almost a hundred each day and most of them are pornal with nasty picture and VDO clips. I have tried several method but they don't seem to be working well at all.

Now, I have to filter the new people to register in my forum to wait for my approval first but it's not a good way at all because my new register getting annoyed that they could not post the topic right away after register. Now less good people register in my forums but spam people still visit me more and more T_T. Below are the method that I have tried.

1. Block I.P. -- Doesn't work. More and more comes.
2. Filter word -- Doesn't work. They still post anyway even though it's not readable.
3. Create a commercial room just for them -- Doesn't work. Most of them still post to the most popular rooms.
4. Threaten, begging, reminding Message -- Also doesn't work. Most of them still posting.

Please advise me. I would like to know how all the webmaster manage their forums to protect these online parasites.... Thank you so much

[Staffa]

It is likely that most of these posts are made by spammer bots.
Have you tried adding a captcha to your form ?

[maximillianos]

Simply make your forms submit via Ajax. Most bots cannot figure it out since Ajax needs to run utilizing the browser's funtionality.

[thecoalman]

Stop them at the door, depending on the forum software you are using there are different modifications you can make to the registration form. Requiring they answer a simple question will eliminate all bot registrations from my experience.

[tone]

Hi

Thanks for the answer. I am using SMF V1.0 right now and it doesn't seem to have a version to put answer or 4 digit code to protect spam.

I prefer to use some add on coding. Is it possible? Or I should install a newer version of SMF?

[Marshall]

If you can run javascript, there is what I call a poor man's capthca. Do a web search for a random password generator and put it in the top of you page. Using an onload function, have it write the results to a read only text field then have the submitter match the code in another text field. If possible, in your submission form script, tell it the two fields must match. Otherwise, use another piece of script to check the form on submit that the fields match. Of course, the down side to the check field method is if javascript is disabled, which is true with bots. However, with the form script verification method, since most bots fill in all blank text fields, even if javascript is disabled, odds are the fields won't match.

I have used this trick on several forms and never had a spam problem and it is very user friendly, IMHO.

Marshall