Probably because when someone posts engine plans or something complex, they show up a lot better when posted as a pdf attachment than simply posted as a JPG.--Also, there are a few things that can not be posted directly and can only be viewed as an attachment, for instance a 3D pdf
Posts in other languages wouldn't bother me a bit and google translate works well these days, but sometimes forums have rules. I went to Intermodellbau in Dortmund in 2003 and survived. I understand the spell checking, but that could be a browser issue as mine works.
my suggestion would be this "that's what I do" if you don't
want to read a post because "whatever reason is" don't reed it
you'll sleep better at night. Their is many reasons why people use
PDF and I don't think that because you don't like it,
that people will change their way of posting
I agree Greg. Attaching a pdf with drawings, plans, etc is a very handy and useful feature, but having the whole text post or just images as a pdf is totally unnecessary. Generally I don't even both opening the pdf, but I wouldn't want the ability to post pdfs removed because then drawings, etc would be more difficult to post and access.
My reply to Greg would be to allow folks to share a project, design. or procedure in a form that old farts like me with short memories, can save for future reference, and print a copy to take to the shop. If the information is just in the forum posting in text, and pictures, it is hard to easily save all the information unless you are fortunate enough to have a recent version of MS Office which allows copy and past of text and pictures at the same time.
I often see a project documented on one of the many forums I read, that I would like to make or at least study. I may have another project in process and need to save the new info for later. If the info is not downloadable, I have to copy and past several pages of text and pictures, from possibly several posts in the thread, to get all the info I need. PDF files, when well written, simplify that process. I humbly thank those that go to the trouble to put them together and post them.
If the entire membership began doing this the forum would be dead. I don't think the information in the PDF will show up in a search of the forum.
I save forum stuff by using a PDF printer driver like PrimoPDF, but there are others. Chuck, if the entirety is in the post and a PDF is attached for download that's great, but that's not what I'm seeing.