I don't think you can tell people off for their success and wanting to share it and hear other people's opinions on unis. Obviously it's super ****ty for those who haven't got places, having been rejected from unis before I know how it feels. And as you said, try, try and try again! But for those with offers, I'm sure their last intention is wanting to make people feel crappy.
Choosing a uni is a life changing decision. Some people just don't suit some unis, and that's why forums like these are so useful. It gives people a chance to share insights into things they know/ may have noticed when looking round unis etc, that others may not have picked up on. Others might simply not be so fortunate as to be able to visit all the unis in the country given their financial, localisation or other circumstances.
Anyone who has multiple offers or just the one: be proud! Congratulations! I hope you find nuggets of useful info on here
Those who have not been successful: don't be disheartened, use your time wisely. Whether it is an enriching, confidence-building gap year or embarking upon an alternative degree (this is what I have done), make the most of it, build yourself up in every way possible.. Ask for feedback if you had an interview, take it on board and don't be stubborn, but DO NOT take it severely to heart. They have you're best interests and want you to succeed. If you aren't such a confident individual, go travelling, get a job, interact with others. Enrich yourself!
As for those who are 'nowhere near the grades', I urge you not to 'think more carefully' just yet, but merely attack the problem from a different angle. I didn't have the grades at A-level, but have since completed a BSc. The amount I have developed in my maturity, knowledge and social ability is indescribable. This is reflected in the success of my application this year - choosing which uni frankly is agonising because I wish I had only one place and didn't have to make he choice and wish that each of my other offers had gone to other individuals who have missed out.
Veterinary isn't for everyone, and you may even realise this on your gap years/ alternative degrees etc. But if it really is for you: DONT GIVE UP!!
Congratulations to those who have been successful and to those who have not: if it's meant to be, it shall be! Best of luck, and see some of you lot in September!