Honestly, Frody is strict as hell to the point that it piss me off sometimes, but I never complain simply because I know that nobody is perfect, and those annoying stuff that he might do from time to time can't negate the great stuff he does most of the time, so I chose to ingore mosts of them and appreciate the time and efforts he invests in the mining board, I can say without a doubt that the mining board has the lowest amount of spam/off-topics, if you aren't serious and don't chose your words carefully the mining board won't be sutible for you.
I do however, recognize your rights to post images of any size you see fit, 150 is more like the standard in the mining section, it's annoying to have to click the image to see it, but frod seems to want that standard to be applied regadless of how unclear some images might become when reduced to such a size.
Having said that and based on my personal experince, frod is a reasonable guy who would reply your PMs regarding any questions, he edited and deleted a ton of my own posts mostly because I quoted posts which were slightly off-topic or are on topic but contain some off-topic information, I reached out to him many times and most of the time he will reply within a short period of time and explain his actions, you should have sent him a PM when that happened, I am sure the outcome would haven better, he is a friendly dude regadless of the heavy hands he has got.