If you're a professional selling your photos,you'd have a site to see the pictures you're selling. Maybe they are small in resolution. Not really copyable but viewable. Why not post photos in similar resolution. If you're not selling your photos, why worry about "stealing".
Being able to see each others photos adds value to advice we give and makes our relationships stronger. Also, no one should ever feel their work is not up to snuff. None of us for the most part are pros, but amateurs trying to learn and get better. Even pros can learn a thing or too. No one's perfect. Discussing photography and showing your pictures allows us to learn more from each other and aid in recommendation we make. Of course, there's going to be the unhappy fellow who only gives negative comments., Screw them. Just learn from the people who want to help you get better.