I think if you all want to work on such a challenge, it is good practice to help others. I do this for several hours every day already. I just do not focus on the older stuff. About 6 months ago, I attempted to do what @DarrenfJ is proposing, but found 90% of the time, the posts were either duplicate posts where the duplicate post already had an accepted answer or the OP responded back with “I already figured this out” after I spent the time writing up responses.
Maybe, to not waste your time on such posts, reply back to the OP with something like “Just checking if you still need help with this question”. That way, hopefully you will get a response either way.
@sorinr With respect to non-FCC related questions, I often find the exact same question over on StackOverflow by a user of a similar name posted within an hour before posting on the FCC forum. Typically, these type of posters are not interested in learning anything. They just want you to do their homework or work project for them. If someone has some code to show with such a question, I will typically make an attempt to guide them in the right direction, but I will not bother if I can tell they just want someone to give then a working solution. The only exception to this rule, is if the problem needing to be solved looks useful for one of my own projects. Then, I will figure out a solution, but instead of posting the solution, give the OP hints and general algorithm steps to get them to figure it.