Prevent rogue registrations from crashing db

OurUmbraco/Our/Controllers/RegisterController.cs

@@ -60,6 +60,28 @@ namespace OurUmbraco.Our.Controllers
                 return Redirect("/");
             }
 
+            // these values are enforced in MemberDto which is internal ;-(
+            // we should really have ways to query for Core meta-data!
+            const int maxEmailLength = 900; // 1000*.9 for safety
+            const int maxLoginNameLength = 900; // 1000*.9 for safety
+            const int maxPasswordLength = 900; // 1000*.9 for safety
+            const int maxPropertyLength = 900; // keep it safe too
+
+            if (model.Email.Length > maxEmailLength
+                || model.Name.Length > maxLoginNameLength
+                || model.Password.Length > maxPasswordLength
+                || model.Location.Length > maxPropertyLength
+                || model.Longitude.Length > maxPropertyLength
+                || model.Latitude.Length > maxPropertyLength
+                || model.Company.Length > maxPropertyLength
+                || model.TwitterAlias.Length > maxPropertyLength
+                )
+            {
+                // has to be a rogue registration
+                // go away!
+                return Redirect("/");
+            }
+
             var member = memberService.CreateMember(model.Email, model.Email, model.Name, "member");
             member.SetValue("location", model.Location);
             member.SetValue("longitude", model.Longitude);