One way to potentially reduce form spam on our site is by considering the impact of javascript. Spammers typically do not have javascript enabled when accessing websites, so this could be a quick and effective solution to lower the amount of spam we receive. It's worth mentioning that I am able to use .asp or .aspx for implementation.
If you want to prevent spam, a good approach is to set a cookie using javascript and then check for it on postback. Another effective method is to implement a simple task that requires javascript execution in order to validate user input. You can learn more about this technique by checking out Phil Haack's "Invisible Captcha Validator" control, which is now part of his Subkismet library:
When working with .net, one method to determine if a browser supports JavaScript is by utilizing Request.Browser.JavaScript. Despite this, the user could potentially have JavaScript disabled. To verify if JavaScript is enabled in a less than elegant way, you can use window.location to direct to page.aspx?jscript=true and then inspect Request.Querystring for said value.
Are you planning to require users to enable JavaScript to access your website? Personally, I find a basic Captcha more user-friendly. For smaller websites, implementing simple Captchas can effectively combat spam.
This tactic has successfully helped us in reducing the amount of spam on our platform.
In my opinion, there is no need to rely on a server-side language for detecting javascript. Additionally, it's not always true that spammers do not use javascript. Your intention is commendable, but your method may be flawed - incorporating a CAPTCHA, as recommended by some of our colleagues, could be an effective solution.
While it's great that you've accepted the noscript answer, it's important to consider how you will tackle spam using this method. Implementing noscript can allow you to include special content for users who have disabled JavaScript in their browsers. However, if your site relies heavily on JavaScript for its functionality, the content may still be accessible to user agents without JavaScript enabled.
Considering this, implementing a captcha system is likely the most effective solution. The main goal is to verify that the user agent interacting with your site is indeed controlled by a human. This approach ensures that legitimate users are able to access the content while deterring automated bots and spammers. It's worth noting that individuals using screen readers for visually impaired access often disable JavaScript, as well as those browsing on mobile devices seeking faster loading times.
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