Personally while I would expect excellent spelling and grammar from items written for articles and blogs I am not so critical of spelling mistakes in places like forums. Spelling mistakes should not hopefully change the meaning of the idea being conveyed.

It can be tricky where pronouns articles(as in a / the etc) are accidentally omitted as this can totally change the meaning of a sentence.

We must remember however in some of the forums that we participate English may not be the native language of a significant number of participants. Despite this they make the effort to communicate often with poor grammar and spelling. Generally however anyone's second language is better than my foreign languages so I would tend to take them seriously. If someone can write in another language it is very likely that they are open minded and intelligent and while it may be difficult to determine what they are trying to say I am inclined to take them seriously. In all likelihood people who can speak or are trying to write in another language are showing openeness and I would want to return that position.

Besides which shouldn't you listen to everyone, gracefully surrender things to youth and consider kindly the counsel of your elders.

You never know who will come up with a gem.