Bracing shock towers?

I have a question for you all. I keep hering about factory spot welds and how week every one seams to think thay are. But I was thinking to make things stronger. Couldent you just brake out the welder and burn it better. I was just thinking this when I was looking at my factory toruqre box's on my car with a few tacks. I said "I am going to brake out the welder and burn them better". Would doing things like that help strangthine things up at all?